Originally Posted by glennjanie
I have moved some pretty heavy loads on 3" SCH 40 PVC pipe even over rough ground.
He means 3 inch, schedule 40, polyvinyl chloride
Otherwise known to plumbers and others as white plastic pipe for drainage or any other neat project you can come up with....like on top of your van to hold stuff.....normally sold in hardware, big box plumbing supply stores.
There are different schedules of pipe as they get larger, stronger, thicker.
I would still recommend some plain old recycled galvanized pipe, it's available everywhere.